Sure this has been brought up before. My Glock mags has .40 stamped on it, not .40 S&W cause Glock don't like other company's name on their product. .40 like .50 is not a cartridge, by same argument don't they shared the same fate.
Or they are biding their time collecting evidence and building a case. The "former cartridge magazine control regulations" say "...cartridges of the type for which the magazine was originally designed and that is designed or manufactured for use in...", while the other company has designed a mag for no specific cartridge (calibre is irrelevant, it is the cartridge that matters) based on both the "literature" (loose term to describe the website FAQ) and the markings on the side of the mag. Either the other company is run by a legal genius, or yet-another-screwup who will soon enough be charged. I hope that doesn't happen, but don't know where else it could go.
Plus is it completely uncool to pollute a vendor's thread, in their own sub-forum, by hot-linking to a competing vendor's (esp. a non-supporting vendor's) product.